[PATCH 08/15] ARM: mxs: Add iomux support
Shawn Guo
shawn.guo at freescale.com
Fri Nov 26 01:49:07 EST 2010
MXS-based SoCs implements iomux functions in block PINCTRL.
Signed-off-by: Shawn Guo <shawn.guo at freescale.com>
---
arch/arm/mach-mxs/include/mach/iomux-mx23.h | 29 +++++++
arch/arm/mach-mxs/include/mach/iomux-mx28.h | 44 +++++++++++
arch/arm/mach-mxs/include/mach/iomux.h | 77 +++++++++++++++++++
arch/arm/mach-mxs/iomux.c | 110 +++++++++++++++++++++++++++
4 files changed, 260 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-mxs/include/mach/iomux-mx23.h
create mode 100644 arch/arm/mach-mxs/include/mach/iomux-mx28.h
create mode 100644 arch/arm/mach-mxs/include/mach/iomux.h
create mode 100644 arch/arm/mach-mxs/iomux.c
diff --git a/arch/arm/mach-mxs/include/mach/iomux-mx23.h b/arch/arm/mach-mxs/include/mach/iomux-mx23.h
new file mode 100644
index 0000000..3fc0439
--- /dev/null
+++ b/arch/arm/mach-mxs/include/mach/iomux-mx23.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2009-2010 Amit Kucheria <amit.kucheria at canonical.com>
+ * Copyright (C) 2010 Freescale Semiconductor, Inc.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#ifndef __MACH_IOMUX_MX23_H__
+#define __MACH_IOMUX_MX23_H__
+
+#include <mach/iomux.h>
+
+/*
+ * The naming convention for the pad modes is MX23_PAD_<padname>__<padmode>
+ * If <padname> or <padmode> refers to a GPIO, it is named GPIO_<unit>_<num>
+ * See also iomux.h
+ *
+ * BANK PIN MUX VOL MA PULL
+ */
+/* DUART */
+#define MX23_PAD_PWM0__DUART_RX IOMUX_PAD(1, 26, PAD_MUXSEL_2, PAD_VOL_NONE, PAD_4MA, PAD_NOPULL)
+#define MX23_PAD_PWM1__DUART_TX IOMUX_PAD(1, 27, PAD_MUXSEL_2, PAD_VOL_NONE, PAD_4MA, PAD_NOPULL)
+
+#endif /* __MACH_IOMUX_MX23_H__ */
diff --git a/arch/arm/mach-mxs/include/mach/iomux-mx28.h b/arch/arm/mach-mxs/include/mach/iomux-mx28.h
new file mode 100644
index 0000000..ca37a15
--- /dev/null
+++ b/arch/arm/mach-mxs/include/mach/iomux-mx28.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2009-2010 Amit Kucheria <amit.kucheria at canonical.com>
+ * Copyright (C) 2010 Freescale Semiconductor, Inc.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#ifndef __MACH_IOMUX_MX28_H__
+#define __MACH_IOMUX_MX28_H__
+
+#include <mach/iomux.h>
+
+/*
+ * The naming convention for the pad modes is MX28_PAD_<padname>__<padmode>
+ * If <padname> or <padmode> refers to a GPIO, it is named GPIO_<unit>_<num>
+ * See also iomux.h
+ *
+ * BANK PIN MUX VOL MA PULL
+ */
+/* DUART */
+#define MX28_PAD_PWM0__DUART_RX IOMUX_PAD(3, 16, PAD_MUXSEL_2, PAD_3V3, PAD_4MA, PAD_NOPULL)
+#define MX28_PAD_PWM1__DUART_TX IOMUX_PAD(3, 17, PAD_MUXSEL_2, PAD_3V3, PAD_4MA, PAD_NOPULL)
+
+/* FEC */
+#define MX28_PAD_ENET0_MDC__ENET0_MDC IOMUX_PAD(4, 0, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL)
+#define MX28_PAD_ENET0_MDIO__ENET0_MDIO IOMUX_PAD(4, 1, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL)
+#define MX28_PAD_ENET0_RX_EN__ENET0_RX_EN IOMUX_PAD(4, 2, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL)
+#define MX28_PAD_ENET0_RXD0__ENET0_RXD0 IOMUX_PAD(4, 3, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL)
+#define MX28_PAD_ENET0_RXD1__ENET0_RXD1 IOMUX_PAD(4, 4, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL)
+#define MX28_PAD_ENET0_TX_EN__ENET0_TX_EN IOMUX_PAD(4, 6, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL)
+#define MX28_PAD_ENET0_TXD0__ENET0_TXD0 IOMUX_PAD(4, 7, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL)
+#define MX28_PAD_ENET0_TXD1__ENET0_TXD1 IOMUX_PAD(4, 8, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL)
+#define MX28_PAD_ENET_CLK__ENET_CLK IOMUX_PAD(4, 16, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL)
+
+/* GPIO */
+#define MX28_PAD_SSP1_DATA3__GPIO_2_15 IOMUX_PAD(2, 15, PAD_MUXSEL_GPIO, PAD_3V3, PAD_4MA, PAD_NOPULL)
+#define MX28_PAD_ENET0_RX_CLK__GPIO_4_13 IOMUX_PAD(4, 13, PAD_MUXSEL_GPIO, PAD_3V3, PAD_4MA, PAD_NOPULL)
+
+#endif /* __MACH_IOMUX_MX28_H__ */
diff --git a/arch/arm/mach-mxs/include/mach/iomux.h b/arch/arm/mach-mxs/include/mach/iomux.h
new file mode 100644
index 0000000..27bcada
--- /dev/null
+++ b/arch/arm/mach-mxs/include/mach/iomux.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
+ * <armlinux at phytec.de>
+ * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#ifndef __MACH_MXS_IOMUX_H__
+#define __MACH_MXS_IOMUX_H__
+
+typedef struct pad_desc {
+ unsigned bank:3;
+ unsigned pin:5;
+ unsigned muxsel:2;
+ unsigned ma:3;
+ unsigned vol:2;
+ unsigned pull:1;
+} iomux_cfg_t;
+
+#define IOMUX_PAD(_bank, _pin, _muxsel, _vol, _ma, _pull) \
+ { \
+ .bank = _bank, \
+ .pin = _pin, \
+ .muxsel = _muxsel, \
+ .vol = _vol, \
+ .ma = _ma, \
+ .pull = _pull, \
+ }
+
+#define PAD_MUXSEL_0 0
+#define PAD_MUXSEL_1 1
+#define PAD_MUXSEL_2 2
+#define PAD_MUXSEL_GPIO 3
+
+#define PAD_1V8 0
+#define PAD_3V3 1
+#define PAD_VOL_NONE 2
+
+#define PAD_4MA 0
+#define PAD_8MA 1
+#define PAD_12MA 2
+#define PAD_16MA 3
+#define PAD_MA_NONE 4
+
+#define PAD_NOPULL 0
+#define PAD_PULL 1
+
+/*
+ * setups a single pad in the iomuxer
+ */
+int mxs_iomux_setup_pad(iomux_cfg_t *pad);
+
+/*
+ * setups multiple pads
+ * convenient way to call the above function with tables
+ */
+int mxs_iomux_setup_multiple_pads(iomux_cfg_t *pad_list, unsigned count);
+
+/*
+ * Initialise the iomux controller
+ */
+void mxs_iomux_init(void __iomem *iomux_base);
+
+#endif /* __MACH_MXS_IOMUX_H__*/
diff --git a/arch/arm/mach-mxs/iomux.c b/arch/arm/mach-mxs/iomux.c
new file mode 100644
index 0000000..803cadf
--- /dev/null
+++ b/arch/arm/mach-mxs/iomux.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2004-2006,2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright (C) 2008 by Sascha Hauer <kernel at pengutronix.de>
+ * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
+ * <armlinux at phytec.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/gpio.h>
+
+#include <asm/mach/map.h>
+
+#include <mach/hardware.h>
+#include <mach/iomux.h>
+
+static void __iomem *base;
+
+/*
+ * configures a single pad in the iomuxer
+ */
+int mxs_iomux_setup_pad(iomux_cfg_t *pad)
+{
+ u32 reg, ofs, bp, bm;
+
+ /* muxsel */
+ ofs = pad->bank * 0x20 + pad->pin / 16 * 0x10;
+ bp = pad->pin % 16 * 2;
+ bm = 0x3 << bp;
+ reg = __raw_readl(base + ofs);
+ reg &= ~bm;
+ reg |= pad->muxsel << bp;
+ __raw_writel(reg, base + ofs);
+
+ /* drive */
+ ofs = cpu_is_mx23() ? 0x200 : 0x300;
+ ofs += pad->bank * 0x40 + pad->pin / 8 * 0x10;
+ /* ma */
+ if (pad->ma != PAD_MA_NONE)
+ {
+ bp = pad->pin % 8 * 4;
+ bm = 0x3 << bp;
+ reg = __raw_readl(base + ofs);
+ reg &= ~bm;
+ reg |= pad->ma << bp;
+ __raw_writel(reg, base + ofs);
+ }
+ /* vol */
+ if (pad->vol != PAD_VOL_NONE)
+ {
+ bp = pad->pin % 8 * 4 + 2;
+ bm = 0x1 << bp;
+ reg = __raw_readl(base + ofs);
+ reg &= ~bm;
+ reg |= pad->vol << bp;
+ __raw_writel(reg, base + ofs);
+ }
+
+ /* pull */
+ ofs = cpu_is_mx23() ? 0x400 : 0x600;
+ ofs += pad->bank * 0x10;
+ bp = pad->pin;
+ bm = 0x1 << bp;
+ reg = __raw_readl(base + ofs);
+ reg &= ~bm;
+ reg |= pad->pull << bp;
+ __raw_writel(reg, base + ofs);
+
+ return 0;
+}
+EXPORT_SYMBOL(mxs_iomux_setup_pad);
+
+int mxs_iomux_setup_multiple_pads(iomux_cfg_t *pad_list, unsigned count)
+{
+ iomux_cfg_t *p = pad_list;
+ int i;
+ int ret;
+
+ for (i = 0; i < count; i++) {
+ ret = mxs_iomux_setup_pad(p);
+ if (ret)
+ return ret;
+ p++;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(mxs_iomux_setup_multiple_pads);
+
+void mxs_iomux_init(void __iomem *iomux_base)
+{
+ base = iomux_base;
+}
--
1.7.1
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